<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>

<div id="app">
  <h1 v-if="isShow">
    <div>abc</div>
    <div>abc</div>
    <div>abc</div>
    <div>abc</div>
    <div>abc</div>
    {{message}}
  </h1>
  <h1 v-else>isShow为false时,显示我</h1>
</div>

<script src="../js/vue%20.js"></script>
<script>
  const app = new Vue({
    el:'#app',
    data:{
      message:'hello',
      isShow: true
    }
  })
</script>
</body>
</html>